The Bax inhibitor GmBI-1 & alpha; interacts with a Nod factor receptor and plays a dual role in the legume-rhizobia symbiosis
文献类型: 外文期刊
作者: Yuan, Songli;Ke, Danxia;Liu, Bo;Zhang, Mengke;Li, Xiangyong;Chen, Haifeng;Zhang, Chanjuan;Huang, Yi;Sun, Shuai;Shen, Jiafang;Yang, Shuqi;Zhou, Shunxin;Leng, Piao;Guan, Yuefeng;Zhou, Xinan
作者机构:
关键词: GmBI-1 & alpha;GmNFR1 & alpha;nodulation;protein-protein interaction;root nodule symbiosis;soybean;yeast two-hybrid screening
期刊名称: JOURNAL OF EXPERIMENTAL BOTANY
ISSN: 0022-0957
年卷期: 2023 年
页码:
收录情况: SCIE(2023版)
摘要: The gene networks surrounding Nod factor receptors that govern the symbiotic process between legumes and rhizobia remain largely unexplored. Here, we identify 13 novel GmNFR1a-associated proteins by yeast two-hybrid screening, and describe a potential interacting protein, GmBI-1a. GmBI-1a had the highest positive correlation with GmNFR1a in a co-expression network analysis, and its expression at the mRNA level in roots was enhanced by rhizobial infection. Moreover, GmBI-1a-GmNFR1a interaction was shown to occur in vitro and in vivo. The GmBI-1a protein was localized to multiple subcellular locations, including the endoplasmic reticulum and plasma membrane. Overexpression of GmBI-1a increased the nodule number in transgenic hairy roots or transgenic soybean, whereas down-regulation of GmBI-1a transcripts by RNA interference reduced the nodule number. In addition, the nodules in GmBI-1a-overexpressing plants became smaller in size and infected area with reduced nitrogenase activity. In GmBI-1a-overexpressing transgenic soybean, the elevated GmBI-1a also promoted plant growth and suppressed the expression of defense signaling-related genes. Infection thread analysis of GmBI-1a-overexpressing plants showed that GmBI-1a promoted rhizobial infection. Collectively, our findings support a GmNFR1a-associated protein in the Nod factor signaling pathway and shed new light on the regulatory mechanism of GmNFR1a in rhizobial symbiosis.
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